Toshiba TLCS-900/H1 Series Manual page 103

3.5.15 Port K (PK0 to PK3)
Port K is a 4-bit output port. Resetting sets the output latch PK to "0", and PK0 to PK3
pins output "0".
In addition to functioning as an output port, port K also functions as output pins for an
LCD controller (LCP0, LLP, LFR and LBCD).
The above settings are made using the function register PKFC.
Reset
PK Bit symbol
(0050H)
Read/Write
Reset State
PKFC Bit symbol
(0053H)
Read/Write
Reset State
Function
PKDR Bit symbol
(0094H)
Read/Write
Reset State
Function
Note: Read-modify-write is prohibited for the register PKFC.
Function control
PKFC write
Output latch
PK write
LCP0, LLP, LFR, LBCD
PK read
Figure 3.5.41 Port K
Port K Register
7 6 5
Port K Function Register
7 6 5
Port K Drive Register
7 6 5
Figure 3.5.42 Register for Port K
92CH21-101
S
A
Selector
Output buffer
B
4 3
PK3
0
4 3
PK3F
0
0: Port
1: LBCD
4 3
PK3D
1
Input/Output buffer drive register for standby mode
TMP92CH21
PK0 (LCP0)
PK1(LLP)
PK2 (LFR)
PK3 (LBCD)
2 1
PK2 PK1
R/W
0 0
2 1
PK2F PK1F
W
0 0
0: Port 0: Port 0: Port
1: LFR 1: LLP 1: LCP0
2 1
PK2D PK1D
R/W
1 1
2009-06-19
0
PK0
0
0
PK0F
0
0
PK0D
1